Realistically, they're quite comparable in overall performance. The Ryzen 5 3550H offers great value/performance for the money, however, the i5 8300H performs better in render based loads like the Adobe product range and has better single and multi-core performance, compared to the Ryzen 5 3550H and even the Ryzen 7 3750H.
Overall, go with the i5 8300H.